Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
SLEIGH KMD-2,5
A number of recent publications in "M-K" on the cord design racing cars and snowmobiles helped us in creating equipment and more heavy class — under the engine working volume of 2.5 cm3....
GRAND CHEROKEE OVERLAND
In 2001 Jeep Grand Marche is 60 years old. It was at this time was to mark the release of a new range of SUVs Grand Cherokee. It is chaired by the variant received its own name Overland...